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C Library Function - sqrt()

C Standard Library - <math.h>

Description

The C library function double sqrt(double x) returns the square root of x.

Declaration

Here is the declaration for the sqrt() function.

double sqrt(double x)

Parameters

Return Value

This function returns the square root of x.

Example

The following example demonstrates the use of the sqrt() function.

#include <stdio.h>
#include <math.h>

int main ()
{
   printf("The square root of %lf is %lf\n", 4.0, sqrt(4.0) );
   printf("The square root of %lf is %lf\n", 5.0, sqrt(5.0) );

   return(0);
}

Let's compile and run the above program, which will produce the following result:

The square root of 4.000000 is 2.000000
The square root of 5.000000 is 2.236068

C Standard Library - <math.h>

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